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预测砂岩和页岩单元的面积对于描述碎屑岩储集层的边界和推测储集层的流动特性是必不可少的。但是,一般来说为了准确地预测岩性的横向变化只靠分布稀疏的井是远远不够的。本文提出一种由地震层速度剖面模拟砂/页岩横剖面模型的蒙特卡罗技术,并借助于一个产油河道砂储集层例子描述了这种技术。制作的砂/页岩互层模型与井中岩性观测结果、地震信息以及资料的空间互相关和自相关结构都是一致的。与仅仅依靠井旁观测结果制作的岩性模型相比,结合地震资料制作的模型在空间上有更好的控制约束,从而可以提供更准确的砂岩和页岩分布图像。
Predicting the area of sandstone and shale units is essential to describe the boundaries of clastic reservoir reservoirs and to predict the flow characteristics of reservoirs. However, in general, it is not enough to rely only on sparsely distributed wells in order to accurately predict lateral changes in lithology. This paper presents a Monte Carlo technique that simulates a sand / shale cross-section model from seismic velocity profiles and describes this technique with the help of an example of a sand production reservoir in an oil-producing channel. The sand / shale interbed model is consistent with well lithology observations, seismic information and spatial cross-correlation and autocorrelation of data. Compared with the lithological model, which is based solely on the well-side observation results, the model combined with the seismic data has better control constraints in space, which can provide more accurate sandstone and shale distribution images.